Add geolocation-based privacy regulation detection to cookie banner

Resolve the visitor's IP to a country code via the geoloc service and
map it to the applicable privacy regulation (GDPR, UK GDPR, FADP, CCPA,
PIPEDA, LGPD, LFPDPPP, POPIA, PDPA, PIPL, PIPA, APPI, DPDP, PDPL).
The regulation and its implied consent mode (OPT_IN / OPT_OUT) are
injected into the GET /config response so the SDK can adapt its behavior.

Also makes geoloc.Service self-contained: LookupCountry and IsPopulated
now manage their own DB connections instead of requiring callers to pass
a pg.Querier.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/geoloc/service.go

@@ -89,17 +89,45 @@ func (s *Service) ImportFromDir(ctx context.Context, dataDir string) error {
 	)
 }
 
-func (s *Service) LookupCountry(ctx context.Context, conn pg.Querier, ip string) (coredata.CountryCode, error) {
+func (s *Service) LookupCountry(ctx context.Context, ip string) (coredata.CountryCode, error) {
 	parsed := net.ParseIP(ip)
 	if parsed == nil {
 		return "", fmt.Errorf("cannot parse IP address: %q", ip)
 	}
 
-	return coredata.LookupCountryByIP(ctx, conn, ip)
+	var cc coredata.CountryCode
+
+	err := s.pgClient.WithConn(
+		ctx,
+		func(ctx context.Context, conn pg.Querier) error {
+			var lookupErr error
+			cc, lookupErr = coredata.LookupCountryByIP(ctx, conn, ip)
+			return lookupErr
+		},
+	)
+	if err != nil {
+		return "", err
+	}
+
+	return cc, nil
 }
 
-func (s *Service) IsPopulated(ctx context.Context, conn pg.Querier) (bool, error) {
-	return coredata.IsIPCountryBlocksPopulated(ctx, conn)
+func (s *Service) IsPopulated(ctx context.Context) (bool, error) {
+	var populated bool
+
+	err := s.pgClient.WithConn(
+		ctx,
+		func(ctx context.Context, conn pg.Querier) error {
+			var lookupErr error
+			populated, lookupErr = coredata.IsIPCountryBlocksPopulated(ctx, conn)
+			return lookupErr
+		},
+	)
+	if err != nil {
+		return false, err
+	}
+
+	return populated, nil
 }
 
 func parseCIDRFile(path string) ([]string, error) {